Oriented film laminates of polyamides and ethylene vinyl alcohol

Details Oriented film laminates of polyamides and ethylene vinyl alcohol Oriented film laminates of polyamides and ethylene vinyl alcohol

1988-10-07

1991-10-08

Seidleck, James J.

Stock material or miscellaneous articles

Composite

Of polyamide

4284758, B32B 2708

Patent

active

050553550

ABSTRACT:
The present invention is a film laminate comprising a polyamide layer, preferably polyepsiloncaprolactam, and a layer of ethylene vinyl alcohol copolymer. The polyamide layer and ethylene vinyl alcohol copolymer layer are preferably adjacent layers. The laminate is expanded to an area of less than 4 times the original area. Preferably, the laminate is drawn to a draw ratio of from 1.5:1 to 4:1 in at least one direction. Preferred laminates have outer layers of polyepsiloncaprolactam and at least one inner layer of ethylene vinyl alcohol copolymer adjacent to at least one layer of polyepsiloncaprolactam. Preferably, the laminate is a multilayer coextrusion.

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Proc. of the Sec. Annual Intl. Conf. on Coextrusion Markets and Tech., COEX'82, Nov. 3-5, 1982, Princeton, N.J.

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